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Beacon 1 control board

Had this issue last Firday
Walk in freezer ( " converted" to walk in cooler) with Beacon 1 set up. came in and found case at 60* going off on hi temp alarm.
Find coil iced up with about 2" thick ice on back and inside. Go to put into manual defrost and it defrosts for about 8 minutes, fans off no heaters.
Check relay and no 24dc to coil to cut heaters on.

I ended up de icing the coil, and installing a paragon time clock in the condesor breaking the contactor to defrost. Cleared the defrost times out of the smart control in the mgrs office. and now it is a regular WIC air defrost and no more issues

Has anyone found or seen a reason that the control isnt sending control voltage to the relay?

Yeah, It's a beacon LOL Did you ohm out all your sensors in an ice bath? If I remember correctly 32000 ohm's +/- 10%. I have converted all my beacon 1 units to conventional systems when the boards go bad. Easier and less headaches than upgrading to a beacon 2. Heatcraft can give you that info or I can see if I can find the pdf

Officially, Down for the count

YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

I know enough to know, I don't know enoughLiberalism-Ideas so good they mandate them

The beacon 1 are junk. But to answer your questions 2sac, yes i did ohm out the sensors, one of the first things i do on any beacon system. They were all ok. And I got the pdf from heatcraft last year sometime about the conversion.